# Logic

Discussion in 'General Discussion' started by CrimsonWhite, Aug 30, 2006.

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### CrimsonWhite*****istrator EmeritusSupporting Member

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You need precisely 4 gallons of water. The only instruments of measurement that you have ar a 5 gallon jug and a 3 gallon jug. Using these jugs, how would you measure precisely 4 gallons?

Kudos to the first that can solve it.

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### NiennaSenior Member

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Fill the 5 gallon jug. Pour water from the 5 gallon jug into the 3 gallon jug to fill the 3 gal jug. Remove half of the water left in the 5 gallon jug. Add the 3 gallons back into the 5 gal jug. But that isn't PRECISE, bc how would you know that you have removed precisely half?

Hmmmm...

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### NiennaSenior Member

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Ah ha!

Fill the five gallon jug. Pour the water into the 3 gal jug to fill it. There will be 2 gallons left in the 5 gal. jug. Reserve this water in a separate container. Repeat. Add the 2 gallons reserved to the 2 gallons left in the 5 gal. container. 4 gallons! Voila!

You said the only instruments of MEASURE were the jugs, but we could have a separate holding container? Yes?

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### CrimsonWhite*****istrator EmeritusSupporting Member

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You are on the right track.

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### The ClayTaurusSenior Member

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Fill the 5 gallon Jug. Empty it into the 3 gallon jug without spilling a drop (leaving 2 gallons in the 5 gallon jug)

Empty the 3 gallon jug

Fill the 3 gallon jug with the 2 gallons from the 5 gallon jug. (now the 5 gallon jug is empty and the 3 gallon jug has 2 gallons in it)

Refill the 5 gallon jug

Pour water into the 3 gallon jug until full (2 gallons already in it plus one more from the 5 gallon jug)

5 gallons less the 1 gallon poured into the 3 gallon jug gives you 4 gallons of water in the 5 gallon jug.

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### CrimsonWhite*****istrator EmeritusSupporting Member

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You are not allowed to use a seperate container. The 5 gallon and 3 gallon jug only.

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### CrimsonWhite*****istrator EmeritusSupporting Member

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DING DING DING

Nice job.
:clap1:

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### The ClayTaurusSenior Member

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*victory dance*

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### NiennaSenior Member

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Great work Clay!

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### dmpSenior Member

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You suck, 2nd Grade sucks, and School sucks and I'm never coming back again!

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